1 files changed, 1 insertions, 1 deletions
diff --git a/lib.c b/lib.c
index 65ea51e..fe5c8d2 100644
--- a/lib.c
+++ b/lib.c
@@ -570,7 +570,7 @@ void free_line(char *line)
  *
  * Return: 0 on success, 1 otherwise.
  */
-int parse_num(int *dest, char *num)
+int parse_num(int *dest, const char *num)
 {
 	char *c = NULL;
 	long temp;